In a statement, NATS said the proposed changes would "improve efficiency and reduce delays in the South".

'Lower for longer'

Paul Haskins, general manager of NATS' London Terminal Control, added: "At the moment, departures from Stansted heading towards the South East are kept lower for longer when compared to the route heading east because of Heathrow arrivals.

"Moving the majority of departure flights from one route to another will improve the flow of aircraft around the London system and greatly increase the efficiency of the airport's operation."

Chris Wiggan, Stansted Airport's head of public affairs, said the airport supported NATS' proposed airspace changes.

"The safe and efficient management of airspace in the South East of England is an important issue and the consultation will provide an opportunity for people to play a full and active part in the process," he said.

Martin Peachey, a noise adviser for campaign group Stop Stansted Expansion, said: "For people living near Stansted, there will be winners and losers. But we support all efforts which reduce aircraft noise and carbon emission."

He added the group would be giving its views to NATS and advising parish councils under the easterly route about how they can have their say.